Golang Env.Get方法代碼示例

func postContainersCopy(eng *engine.Engine, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if vars == nil {
		return fmt.Errorf("Missing parameter")
	}

	var copyData engine.Env

	if contentType := r.Header.Get("Content-Type"); contentType == "application/json" {
		if err := copyData.Decode(r.Body); err != nil {
			return err
		}
	} else {
		return fmt.Errorf("Content-Type not supported: %s", contentType)
	}

	if copyData.Get("Resource") == "" {
		return fmt.Errorf("Path cannot be empty")
	}
	if copyData.Get("Resource")[0] == '/' {
		copyData.Set("Resource", copyData.Get("Resource")[1:])
	}

	job := eng.Job("container_copy", vars["name"], copyData.Get("Resource"))
	job.Stdout.Add(w)
	if err := job.Run(); err != nil {
		utils.Errorf("%s", err.Error())
	}
	return nil
}

func TestPostContainersCreate(t *testing.T) {
	eng := NewTestEngine(t)
	defer mkRuntimeFromEngine(eng, t).Nuke()
	srv := mkServerFromEngine(eng, t)

	configJSON, err := json.Marshal(&docker.Config{
		Image:  unitTestImageID,
		Memory: 33554432,
		Cmd:    []string{"touch", "/test"},
	})
	if err != nil {
		t.Fatal(err)
	}

	req, err := http.NewRequest("POST", "/containers/create", bytes.NewReader(configJSON))
	if err != nil {
		t.Fatal(err)
	}

	r := httptest.NewRecorder()
	if err := docker.ServeRequest(srv, docker.APIVERSION, r, req); err != nil {
		t.Fatal(err)
	}
	assertHttpNotError(r, t)
	if r.Code != http.StatusCreated {
		t.Fatalf("%d Created expected, received %d\n", http.StatusCreated, r.Code)
	}

	var apiRun engine.Env
	if err := apiRun.Decode(r.Body); err != nil {
		t.Fatal(err)
	}
	containerID := apiRun.Get("Id")

	containerAssertExists(eng, containerID, t)
	containerRun(eng, containerID, t)

	if !containerFileExists(eng, containerID, "test", t) {
		t.Fatal("Test file was not created")
	}
}

func (container *Container) allocateNetwork() error {
	mode := container.hostConfig.NetworkMode
	if container.Config.NetworkDisabled || mode.IsContainer() || mode.IsHost() {
		return nil
	}

	var (
		env *engine.Env
		err error
		eng = container.daemon.eng
	)

	job := eng.Job("allocate_interface", container.ID)
	if env, err = job.Stdout.AddEnv(); err != nil {
		return err
	}
	if err := job.Run(); err != nil {
		return err
	}

	if container.Config.PortSpecs != nil {
		if err := migratePortMappings(container.Config, container.hostConfig); err != nil {
			return err
		}
		container.Config.PortSpecs = nil
		if err := container.WriteHostConfig(); err != nil {
			return err
		}
	}

	var (
		portSpecs = make(nat.PortSet)
		bindings  = make(nat.PortMap)
	)

	if container.Config.ExposedPorts != nil {
		portSpecs = container.Config.ExposedPorts
	}
	if container.hostConfig.PortBindings != nil {
		bindings = container.hostConfig.PortBindings
	}

	container.NetworkSettings.PortMapping = nil

	for port := range portSpecs {
		if err := container.allocatePort(eng, port, bindings); err != nil {
			return err
		}
	}
	container.WriteHostConfig()

	container.NetworkSettings.Ports = bindings
	container.NetworkSettings.Bridge = env.Get("Bridge")
	container.NetworkSettings.IPAddress = env.Get("IP")
	container.NetworkSettings.IPPrefixLen = env.GetInt("IPPrefixLen")
	container.NetworkSettings.Gateway = env.Get("Gateway")

	return nil
}

func TestPostCommit(t *testing.T) {
	eng := NewTestEngine(t)
	defer mkRuntimeFromEngine(eng, t).Nuke()
	srv := mkServerFromEngine(eng, t)

	// Create a container and remove a file
	containerID := createTestContainer(eng,
		&docker.Config{
			Image: unitTestImageID,
			Cmd:   []string{"touch", "/test"},
		},
		t,
	)

	containerRun(eng, containerID, t)

	req, err := http.NewRequest("POST", "/commit?repo=testrepo&testtag=tag&container="+containerID, bytes.NewReader([]byte{}))
	if err != nil {
		t.Fatal(err)
	}

	r := httptest.NewRecorder()
	if err := docker.ServeRequest(srv, docker.APIVERSION, r, req); err != nil {
		t.Fatal(err)
	}
	assertHttpNotError(r, t)
	if r.Code != http.StatusCreated {
		t.Fatalf("%d Created expected, received %d\n", http.StatusCreated, r.Code)
	}

	var env engine.Env
	if err := env.Decode(r.Body); err != nil {
		t.Fatal(err)
	}
	if _, err := srv.ImageInspect(env.Get("Id")); err != nil {
		t.Fatalf("The image has not been committed")
	}
}

func postContainersCopy(eng *engine.Engine, version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if vars == nil {
		return fmt.Errorf("Missing parameter")
	}

	var copyData engine.Env

	if contentType := r.Header.Get("Content-Type"); api.MatchesContentType(contentType, "application/json") {
		if err := copyData.Decode(r.Body); err != nil {
			return err
		}
	} else {
		return fmt.Errorf("Content-Type not supported: %s", contentType)
	}

	if copyData.Get("Resource") == "" {
		return fmt.Errorf("Path cannot be empty")
	}

	origResource := copyData.Get("Resource")

	if copyData.Get("Resource")[0] == '/' {
		copyData.Set("Resource", copyData.Get("Resource")[1:])
	}

	job := eng.Job("container_copy", vars["name"], copyData.Get("Resource"))
	job.Stdout.Add(w)
	if err := job.Run(); err != nil {
		utils.Errorf("%s", err.Error())
		if strings.Contains(err.Error(), "No such container") {
			w.WriteHeader(http.StatusNotFound)
		} else if strings.Contains(err.Error(), "no such file or directory") {
			return fmt.Errorf("Could not find the file %s in container %s", origResource, vars["name"])
		}
	}
	return nil
}

func (container *Container) allocateNetwork() error {
	if container.Config.NetworkDisabled {
		return nil
	}

	var (
		env *engine.Env
		err error
		eng = container.runtime.eng
	)

	if container.State.IsGhost() {
		if container.runtime.config.DisableNetwork {
			env = &engine.Env{}
		} else {
			currentIP := container.NetworkSettings.IPAddress

			job := eng.Job("allocate_interface", container.ID)
			if currentIP != "" {
				job.Setenv("RequestIP", currentIP)
			}

			env, err = job.Stdout.AddEnv()
			if err != nil {
				return err
			}

			if err := job.Run(); err != nil {
				return err
			}
		}
	} else {
		job := eng.Job("allocate_interface", container.ID)
		env, err = job.Stdout.AddEnv()
		if err != nil {
			return err
		}
		if err := job.Run(); err != nil {
			return err
		}
	}

	if container.Config.PortSpecs != nil {
		utils.Debugf("Migrating port mappings for container: %s", strings.Join(container.Config.PortSpecs, ", "))
		if err := migratePortMappings(container.Config, container.hostConfig); err != nil {
			return err
		}
		container.Config.PortSpecs = nil
		if err := container.writeHostConfig(); err != nil {
			return err
		}
	}

	var (
		portSpecs = make(nat.PortSet)
		bindings  = make(nat.PortMap)
	)

	if !container.State.IsGhost() {
		if container.Config.ExposedPorts != nil {
			portSpecs = container.Config.ExposedPorts
		}
		if container.hostConfig.PortBindings != nil {
			bindings = container.hostConfig.PortBindings
		}
	} else {
		if container.NetworkSettings.Ports != nil {
			for port, binding := range container.NetworkSettings.Ports {
				portSpecs[port] = struct{}{}
				bindings[port] = binding
			}
		}
	}

	container.NetworkSettings.PortMapping = nil

	for port := range portSpecs {
		binding := bindings[port]
		if container.hostConfig.PublishAllPorts && len(binding) == 0 {
			binding = append(binding, nat.PortBinding{})
		}

		for i := 0; i < len(binding); i++ {
			b := binding[i]

			portJob := eng.Job("allocate_port", container.ID)
			portJob.Setenv("HostIP", b.HostIp)
			portJob.Setenv("HostPort", b.HostPort)
			portJob.Setenv("Proto", port.Proto())
			portJob.Setenv("ContainerPort", port.Port())

			portEnv, err := portJob.Stdout.AddEnv()
			if err != nil {
				return err
			}
			if err := portJob.Run(); err != nil {
				eng.Job("release_interface", container.ID).Run()
				return err
			}
			b.HostIp = portEnv.Get("HostIP")
//.........這裏部分代碼省略.........